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Hi my name is Robert...
What is the Year, Make and model of the RV????
IF they are 12 volt lights they will be fuse protected, the power for the lights inside should come from your interior fuse box. When this is happening I would get a 12 volt test light and probe each fuse in your fuse box for power, if you had a loosen connection or the fuse was loose it could cause this issue, I would check the wiring on the back side of the fuse panel for that particular fuse and make sure the wires are not loose. Check all your connections as well at each light and switch make sure nothing is loose as well. It is possible since it is only confined to SOME of the 12 volt lighting the problem is in the wiring harness from the fuse panel to the switch or from the switch to the lights. Normally if the lights go out and then come back on it can be a bad connection at some point so I would check the areas that you have access to...... Hope this helps some... Robert
Hi... Was just checking in to see if my answer helped, IF you have more questions or concerns please feel free to contact me...
Please let me know if you need more help, I am around daily and respond when I can..